Step
| Action
| Value(s)
| Yes
| No
|
1
| Did
you perform the Powertrain On-Board Diagnostic (OBD) System Check?
| --
|
Go to Step 2
| Go to
Powertrain On Board Diagnostic (OBD) System Check
|
2
| Did you perform the Fuel Injector Coil Test Procedure?
| --
|
Go to Step 3
| Go to
Fuel Injector Solenoid Coil Test
|
3
| Is the engine coolant temperature
above the specified value?
| 94°C (201°F)
|
Go to Step 4
|
Go to Step 5
|
4
| Allow the engine
to cool below the specified value.
Is the engine coolant temperature below the specified value?
| 94°C (201°F)
|
Go to Step
5
| --
|
5
|
Caution: Wrap a shop towel around the fuel pressure connection in order to reduce
the risk of fire and personal injury. The towel will absorb any fuel leakage
that occurs during the connection of the fuel pressure gage. Place the towel
in an approved container when the connection of the fuel pressure gage
is complete.
- Turn OFF the ignition.
- Connect the J 34730-1A
fuel pressure gauge to the fuel pressure test port.
- Turn ON the ignition leaving the engine OFF.
- Install the scan tool.
- Energize the fuel pump using the scan tool.
- Place the bleed hose of the fuel pressure gauge into an approved
gasoline container.
- Bleed the air out of the fuel pressure gauge.
- Again energize the fuel pump using the scan tool.
- Wait for the fuel pressure to build.
Important: The fuel pump will run for approximately 2 seconds. Energize
the fuel pump as necessary in order to achieve the highest possible fuel pressure.
- Observe the reading on the fuel pressure gauge while the fuel
pump is operating.
Is the fuel pressure within the specified limits?
| 379-427 kPa
(55-62 psi)
|
Go to Step
6
| Go to
Fuel System Diagnosis
|
6
| After the fuel
pump stops, the fuel pressure may vary slightly, then should hold steady.
Does the fuel pressure remain constant within the specified value?
| 379-427 kPa (55-62 psi)
|
Go to Step 7
| Go to
Fuel System Diagnosis
|
7
|
- Connect the J 39021
fuel injector tester, the J 39021-210
injector switch box and the J 39021-303
injector test adapter.
- Set the amperage supply selector switch on the fuel injector tester
to the Balance Test 0.5-2.5 amp position.
- Energize the fuel pump using the scan tool in order to pressurize
the fuel system.
- Record the fuel pressure indicated by the fuel pressure gauge
after the fuel pressure stabilizes. This is the 1st pressure reading (1).
- Energize the fuel injector by depressing the Push to Start Test
button on the fuel injector tester.
- Record the fuel pressure indicated by the fuel pressure gauge
after the fuel pressure gauge needle has stopped moving. This is the 2nd pressure
reading (2).
- Repeat steps 1 through 6 for each fuel injector.
- Subtract the 2nd pressure reading from the 1st pressure reading
for one fuel injector. The result is the pressure drop value.
- Obtain a pressure drop value for each fuel injector.
- Add all of the individual pressure drop values. This is the total
pressure drop.
- Divide the total pressure drop by the number of fuel injectors.
This is the average pressure drop.
Does any fuel injector have a pressure drop value that is either higher
than the average pressure drop or lower than the average pressure drop by
the specified value?
| 10 kPa (1.5 psi)
|
Go to Step 8
| Go to
Symptoms
|
8
|
Notice: Do not repeat any portion of this test before running the engine in
order to prevent the engine from flooding.
Re-test any fuel injector that does not meet the specification.
Refer to the procedure in step 7.
Does any fuel injector still have a pressure drop value that is either
higher than the average pressure drop or lower than the average pressure drop
by the specified value?
| 10 kPa (1.5 psi)
|
Go to Step 9
| Go to
Symptoms
|
9
| Replace the faulty fuel injector(s). Refer to
Sequential Multiport Fuel Injector Replacement
.
Is the replacement complete?
| --
|
Go to Step 10
| --
|
10
|
Caution: The fuel pump will operate for 2 seconds after you have turned off the
ignition. Make sure that all the fuel pipes and fittings are securely fastened
in order to prevent personal injury.
- Turn OFF the ignition.
- Relieve the fuel pressure. Refer to Fuel Pressure
Relief Procedure
.
- Remove test equipment.
- Re-connect all harnesses and fuel pipes.
- Install a scan tool.
- Turn ON the ignition leaving the engine OFF.
- Inspect for fuel leaks.
- Using the scan tool, select Clear Information function.
- Start the engine.
- Idle until normal operating temperature is reached.
Are any DTCs displayed that have not been diagnosed?
| --
| Go to the applicable DTC table
| System OK
|
